FIELD: optical recognition of images.
SUBSTANCE: device has , placed serially along and symmetrically to its axis, gathering lens, light source, solid screen, diaphragm with aperture, mounted with possible rotation, and photo-detector, means for space placement of entrance port relatively to identification element and electrical processing block, recording and comparing output electric signals of photo-detector. Light source is placed in focal plane of lens, and solid screen - right behind it. Photo-detector is made one-element with expanded sensitive area, enveloping all optical radiation, sent through diaphragm aperture in its any position.
EFFECT: lesser dimensions, simplified construction.
4 cl, 2 dwg
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